4l80e surging
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On The Tree
Joined: Mar 2009
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4l80e surging When I am at low rpms crusing through the heighborhood by my house the tranny actslike it is trying to shift in between second and third but can't decide which to go into. If i throttle it up a little it goes in solid and accelerates. As long as I am above 2200 or so it is fine. What is the problem and how do I fix it. Any help is appreciated.
Sounds like the lockup coming in and out/engaging and disengaging..... What do you know about the condition of the trans and converter? The solenoid for lockup goes out at high mileage too....
Teching In
Joined: Jun 2002
Posts: 18
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From: Georgia
When I am at low rpms crusing through the heighborhood by my house the tranny actslike it is trying to shift in between second and third but can't decide which to go into. If i throttle it up a little it goes in solid and accelerates. As long as I am above 2200 or so it is fine. What is the problem and how do I fix it. Any help is appreciated.
This connection provide the power, speed and lockup basically everthing.
I had this problem with mine, it was bucking but only once in a while. The problem was the ECU was receiving a speed signal only up to 30mph then it stayed at 30, so the ECU thinks the car is going 30 all the time but your TPS is saying more Throttle. I had it on jack stands and thought the speed sensor in the trans was bad, but when I took the connector back off I realized it was not put on and the lock not not fully tighted down to hold it in place. This fixed the problem for me.
I would start here, the simple things.
Remember its not the programming in the ECU that didn't change
If this isnt it, then my next question is did you change the ring and pinion ratio different from what the Truck had. If yes now you will have to go into the programming with HP Tuners and fix it. The problem will mostlily be the MPH not inline with TPS cause it to not have the hystereses it once had between gears.
JW
Thread Starter
On The Tree
Joined: Mar 2009
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okay, I will check the connector as far as the Gears and stuff go I did change them. I had speartech set up my computer for the tire size and gear ratio. It only does it when it is trying to go from second to third. If i hold it in second it is fine or if I am in drive and stuff stay hard on the throttle. It only happens when I am just easing on it around town or soemthing like that.
